It uses the same bayonet as a M1917 Enfield. All seven of the standard issue US military shotguns up until Vietnam with bayonet lugs use this same bayonet. In Vietnam, they switched to the M7 bayonet on shotguns.

Cool 97. I have an original fixed barrel job that I did a complete refurb on. The take down guns had soft threads and most all of them your going to see have loose barrels or tensioners at their end. Good Norinco did the fixed barrel. Question is, is it still a slam fire action? My 1897 has it in case your swarmed by zombies, just hold the trigger back and pump away just like the old Ithaca 37's.